. >> i interviewed someone whose picture was supposedly manti te'o's girlfriend. she had a private facebook page. someone took her picture and pretended she was somebody else. >> fascinating. lauren, howy, thank you very much. interesting discussion. we'd like to hear from you. what kind of social media policies govern your workplace? how should they evolve? you can weigh in with the open thread we posted our home page and don't forget to like the newshour on facebook. >> again, the major >> woodruff: again, the major developments of the day. a bipartisan group of eight senators unveiled an immigration reform plan that offers a path to citizenship for 11 million people living in the u.s. illegally. thousands of egyptian protesters defied new curfews and rallied against the islamist-dominated government. late today the senate passed a $50 billion relief bill for victims of hurricane sandy. online, we have a science lesson inspired by an announcement from nasa. hari sreenivasan has the details. >> sreenivasan: just what is dark matter? find a short video with a simp